Nailer device

ABSTRACT

A nailer device has a housing containing a motor and a striking device arranged in a compact manner. A transmission mechanism is mounted in the housing for translating the rotating motions of the motor into the periodic impact motions upon the striking device. The transmission mechanism includes an impact assembly which imparts the periodic impact motions upon the striking device.

BACKGROUND

The following generally relates to a nailer device and, moreparticularly, relates to an electric nailer device.

Nailer devices are commonly used portable tools. In accordance with thetype of power source utilized, nailer devices can be generally dividedinto two types, e.g., pneumatic nailer devices and electric nailerdevices. A pneumatic nailer device is operated with an air compressorattached as a power supply, which is commonly inconvenient for a user tomove to different places during operation, so that the using of thepneumatic nailer device is limited in many occasions. An electric nailerdevice generally comprises a transmission mechanism for transmittingrotating motions of a motor into linear movements of an impact rodarranged in a nozzle. When a switch on the nailer device is turned on,electric power energy is thus converted into mechanical energy ofreciprocating motions.

Both U.S. Pat. No. 6,431,430 and PCT Publication No. WO2006/008546disclose a kind of electric nailer device powered by a battery pack. Thedisclosed nailer device comprises a crank-slider transmission mechanismfor transferring rotating motions of a motor into linear motions.However, one disadvantage of this kind of nailer device is that thecrank-slider transmission mechanism substantially performs push actionsand the nailing efficiency of such push actions is much lower than thatof strike actions when the nailer device is provided with the same motorpower. Another disadvantage is that the push power of the pushing roddriven by the crank-slider transmission mechanism is a constant, so whenthe nail meets a hard object, the resistance force caused thereby maycause the rotor of the motor to stop subjecting the motor to possibledamage. A further disadvantage is that the motor is arranged in front ofor behind the handle so that the connection between the motor and thetransmission mechanism takes a lot of space which makes the nailerdevice relatively larger and inconvenient for a user to carry.

Yet further, Chinese Patent Application No. 200410088827.9 discloses anailer device comprising a transmission mechanism which transfersrotational power of a motor to provide a compression force to a springwhereupon the spring is released through a release means to produce animpact force. This nailer device can carry out a single-strike actionunder the spring force, but not a continuous strike action, so the workefficiency is still relatively low, which results in the nailer devicenot gaining acceptance as a commonly used tool. Otherwise, the motor isarranged below the head of the housing, which is apart from the handle,so the structure of the nailer device is not compact.

SUMMARY

The following describes an improved electric nailer device which cancarry out continuous strike actions. To this end, the nailer devicecomprises a housing containing a motor therein and a striking device. Atransmission mechanism is mounted in the housing which transfersrotating motions of the motor into periodic impact motions of thestriking device. The transmission mechanism comprises an impact assemblywhich impacts the striking device periodically.

The striking device may comprise a striking portion which can contact ahead of a nail to be stricken and an impacted portion which can becontacted with the impact assembly.

The striking device may comprise a reciprocating member which can bemoved in a reciprocating manner relative the housing.

The impact assembly may comprise a rotary impact member having arotating axis.

The rotary impact member may comprise at least an impact part which cancontact the impacted portion of the striking device periodically.

As will become apparent, the rotating motions of the motor are convertedwithin the subject nailer into reciprocating striking movements of thestriking device with the aid of a restoring device. Thus, while themotor continues rotating, the rotating motions of the motor areconverted into periodic impact actions of the impact assembly throughthe transmission mechanism allowing the striking device to be drivenwith reciprocating movements to continuously strike the nail. Thesubject nailer also provides a relatively more compact structure and cancarry out efficient and continuous strike actions, which overcomes thedisadvantages of a single-strike or shoot-type nailer device of theprior art. Compared with this prior art, the subject nailer device issubstantially different and improved so that the nailer device can beapplied in different work occasions.

A better appreciation of the objects, advantages, features, properties,and relationships of the electric nailer disclosed hereinafter will beobtained from the following detailed description and accompanyingdrawings which set forth illustrative embodiments which are indicativeof the various ways in which the principles described hereinafter may beemployed.

BRIEF DESCRIPTION OF THE DRAWINGS

For use in better understanding the subject electric nailer referencemay be had to the following drawings in which:

FIG. 1 is a perspective view of a first exemplary embodiment of anelectric nailer device constructed according to the present invention;

FIG. 2 is a cutaway view of the nailer device of FIG. 1 taken along acombination surface of the two half housings, wherein a battery of thenailer device is removed for clarity;

FIG. 3 is a cutaway view of the nailer device of FIG. 1 taken along thesurface which is perpendicular to the combination surface of the twohalf housings, wherein the battery of the nailer device is removed forclarity;

FIG. 4 is a partial exploded view of a transmission mechanism of thenailer device of FIG. 1;

FIG. 5 is a sectional view of an impact wheel of the nailer device ofFIG. 1;

FIG. 6 is a front view of a rotating shaft of the nailer device of FIG.1;

FIG. 7 is a schematic view showing two movement states of a steel ball,a guiding slot on the inner wall of the impact wheel, and an inclinedslot of the rotating shaft of the nailer device of FIG. 1.

FIG. 8 is a perspective view of a second exemplary embodiment of anelectric nailer device constructed according to the present invention;

FIG. 9 is a cutaway view of the nailer device of FIG. 8 taken along thecombination surface of the two half housings, wherein the battery of thenailer device is removed for clarity; and

FIG. 10 is a cutaway view of the nailer device of FIG. 8 taken along thesurface which is perpendicular to the combination surface of the twohalf housings, wherein the battery of the nailer device is removed forclarity.

DETAILED DESCRIPTION

With reference to FIGS. 1 and 2, a nailer device 1 of a first exemplaryembodiment comprises a housing 3 containing a motor 2 and having anozzle portion 4. The housing 3 is composed with a first half housing 31and a second half housing 32, both of which form a chamber. An elongategrip is formed on a main body of the housing 3. An upper portion of thehousing 3 comprises a hole. At least a part of the nozzle portion 4 isextended outward from the hole.

The nailer device 1 comprises a battery pack 5 for powering the motor 2.However, the nailer device 1 need not be restricted to the use of a DCpower supply and may be equally powered by a source of AC power. Aswitch 6 is arranged on the housing 3 for controlling the motor 2. Thenozzle portion 4 includes a striking rod 41 mounted therein through arestoring spring 42 for striking a nail 7. The striking rod 41 isdisposed substantially perpendicular to the main body of the housing 3and is moved in a reciprocating manner within the nozzle portion 4. Thestriking rod 41 includes a first end 411 and a second end 413. Duringoperation, the striking rod 41 is driven to move and the first end 411acts on a head of the nail 7. The nozzle portion 4 further includes aretractable nail containing device 43 which is provided with an opening431 for containing at least the head of the nail. By way of example, amagnet, which is not shown in the drawings, may be included in the nailcontaining device 43 for attaching the nail 7 in the opening 431. Thediameter of the opening 431 is bigger than the nails commercially usedso nails with different shapes and sizes can be placed therein.

With reference to FIGS. 3-7, a transmission mechanism is arranged in thehousing 3 for converting rotating motions of the motor 2 into impactmotions of the striking rod 41. The motor 2 includes a motor shaft 21,an axis of which is located on or parallel to a longitudinal directionof the main body of the housing 3. The motor shaft 21 is connected witha multi-stage gear transmission mechanism including bevel gears. In thisway, the rotation power of the motor 2 is transmitted to a rotatingshaft 8 which is mounted in the upper portion of the housing 3 by twobearings. A pair of inclined slots 9, each of which is generallyV-shaped, is formed on the rotating shaft 8. An impact wheel 10, whichis preferably a hollow cylinder, is mounted on the rotating shaft 8. Theimpact wheel 10 comprises a pair of arcuate guiding slots 11 which areformed on its inner wall and opposite to the inclined slots 9respectively. The open direction of each arcuate guiding slot 11 isreversed to that of each V-shaped slot 9. Both the inclined slots 9 andthe guiding slots 11 are formed as half-circular recesses. A pair ofsteel balls 12 is arranged movably in two chambers formed by theinclined slots 9 and the guiding slots 11. When the inclined slots 9 aremoved relative to the guiding slots 11, the chambers formed thereby aremoved with a result that the steel balls 12 can be moved along with thechambers. The impact wheel 10 can thus be driven to rotate through thesteel balls 12 pressing the guiding slots 11 when the rotating shaft 8is rotated. An energy storing spring 13 is mounted between the impactwheel 10 and the rotating shaft 8 in manner so that an end of the energystoring spring 13 abuts to a shoulder 81 of the rotating shaft 8 another end of the energy storing spring abuts to a side surface of theimpact wheel 10. Under an axial biasing force of the energy storingspring 13 acting upon the shoulder 81 and the impact wheel 10, as thesolid lines show in FIG. 7, the steel balls 12 are located at top endsof the V-shaped slots 9 and bottom ends of the guiding slots 11 when therotating shaft 8 and the impact wheel 10 are action less or rotated withno load. In this state, the impact wheel 10 is at a first axial positionrelative to the rotating shaft 8.

With reference to FIGS. 2 and 4, a pair of stop pins 15 is fixed in thehousing 3, which is adjacent to a periphery of the impact wheel 10.Preferably, a pair of projections 14, which are extended along thediameter direction of the rotating wheel 10, is provided on theperiphery of the rotating wheel. When the switch 6 is turned on, themotor 2 is powered to rotate to drive the rotating shaft 8 through themulti-stage gear transmission and the impact wheel 10 is rotatedtogether with the rotating shaft 8 under the cooperation of the inclinedslots 9, the guiding slots 11, the steel balls 12, and the energystoring spring 13. When the impact wheel 10 is rotated to a positionwhere the projections 14 contact the stop pins 15, the impact wheel 10is provisionally stopped from rotating by the stop pins 15, while thelocations of the guiding slot 11 of the impact wheel 10, the steel ball12 and the inclined slot 9 are indicated with the solid lines in FIG. 7.As the rotating shaft 8 is driven to continue rotating, each of theinclined slots 9 is rotated thereby along a direction indicated with anarrow A to a location indicated with dotted lines in FIG. 7 so that eachcorresponding steel ball 12 is pressed to move along with the inclinedslot 9 toward the top end of the V-shaped 5 slot. Accordingly, theimpact wheel 10 is pushed to move along its axis to a second axialposition and presses the energy storing spring 13 thereby, while thelocations of the guiding slot 11 of the impact wheel 10, the steel ball12, and the inclined slot 9 are indicated with the dotted lines in FIG.7. Obviously, the impact wheel 10 has a certain rotation lag relative tothe rotating shaft 8 during displacement. At the second axial position,the projections 1410 depart from the stop pins 15, so that the rotatingof the impact wheel 10 can not be stopped by the stop pins 15 any more.Under a function of rebound force of the energy storing spring 13, theimpact wheel 10 is pressed back to its first axial position quickly.With the cooperation of the inclined slots 9, the guiding slots 11, andthe steel balls 12, the impact wheel 10 is driven to rotate by therotating shaft 8 again. In this reposition process, which is 15 reversedto the above displacement process, the impact wheel 10 has a certainrotation excess relative to the rotating shaft 8, so it rotates at ahigher speed than the rotating shaft 8 in this reposition process. Forimproving the nailing efficiency, the strength of the energy storingspring is preferably suited with the rotating speed of the motor, sothat the projections will impact the striking rod after the impact wheelis substantially back to its original position, 20 e.g., the first axialposition. As a result, a second end 413 of the striking rod 41 isimpacted by the projections 14 of the impact wheel 10 to move at a highspeed in a direction away from the projections 14 and a first end 411 ofthe striking rod 41 strikes the head of the nail 7 quickly. In this way,a repeating strike action is achieved. When the projections 14 arecontinuously driven to rotate to contact the stop pins 15, the impactwheel 10 is stopped rotating again to enter into succeeding cycles.While the striking rod 41 is moved to drive the nail 7, the restoringspring 42 is compressed. When the strike action is finished, thestriking rod 41 is returned back to its original position under therebound force of the restoring spring 42.

As illustrated, the rotating shaft 8 and the impact wheel 10 have thesame rotating axis. When the projections 14 impact the second end 413 ofthe striking rod 41, the direction of the impact force is perpendicularto the rotating axis of the impact wheel 10. Preferably, the normaldirections of contacting surfaces of the second end 413 and theprojections 14 are perpendicular to the rotating axis of the impactwheel 10.

In this exemplary embodiment, the V-shaped slots 9, each of whichconsists of a recess inclined in two directions, and the arcuate guidingslots 11, the open directions of which are reversed to the opendirections of the V-shaped slots 9, are preferably selected to cooperatewith each other. However, since during the operation only one side ofthe V-shaped slot is functioning, the inclined slot can be provided witha recess only inclined in one direction with the strike action stillbeing achievable.

In the first described exemplary embodiment, the striking device whichcontacts the nail directly is the rod 41 which is elongated. It will beappreciated, however, that the striking device may also be substitutedwith other component with different shapes and structures to achieve thesame result. Similarly, the projections on the impact wheel may beprovided on other positions of the impact wheel as long as thecontacting part of the projection and the rod is departed from the axisof the impact wheel. For example, the projection may be positioned on aside of the impact wheel. Still further, the impact wheel may besubstituted with other impact members with different shapes andstructures. For example, the impact member may be a rod shape, which ismounted on the rotating shaft through a hole while at least an end ofthe impact member functions as the projections of the impact wheel.

In the illustrated, exemplary embodiment the striking rod 41 is pressedtoward the inside of the housing under the biasing force produced by therestoring spring 42. In this manner, the rod 41 is impacted by theimpact wheel 10 as soon as the nailer device is turned on. In analternative embodiment, a spring or other restoring device may bearranged to produce a force that acts on the striking device toward theoutside of the housing so that the impact member will not contact withthe rod when there is no force toward the inside of the housing thatacts on the striking device. Thereby it will decrease abrasion betweenthe impact device and the striking device when the nailer device isoperated with no load, and the service life is extended. In otherembodiments, a friction member may be mounted between the strikingdevice and other parts of the nozzle (for example: a rubber seal ring oran appropriate shaped rubber member) so that when there is no forceacting upon the striking device, the striking device can be held at thepresent location relative to the other parts of the nozzle, which alsocan reduce the abrasion between the impact device and the strikingdevice.

The stop pins of the nailer device in the first exemplary embodiment canbe removed, and the detailed reason of which will be described in thefollowing second exemplary embodiment.

With reference to FIGS. 8-10, a second exemplary embodiment of a nailerdevice according to the present invention is shown. The appearances ofthe first and second embodiments are obviously different from eachother. A housing 30 of the nailer device in the second embodiment issubstantially T-shaped when the battery pack is removed, and a motor 20is arranged horizontally in the housing 30 and behind a nozzle 40.However, a transmission mechanism and the principle utilized in thenailer device in the second exemplary embodiment are similar to that inthe first embodiment and, as such, need not be described in detailherein.

Besides the shape differences of several components, a distinctdifference between the first and the second exemplary embodiments isthat the nailer device in the second embodiment does not comprise anystop pins. During operation, when a nail is being struck into a hardermaterial or the nail has been struck into the material, the striking rodmay bear a higher resistance with a result that the rod will stop movingin a status that a maximum stroke of the rod is not reached. Meanwhilean end of the striking rod, which is to be contacted with an impactwheel, effectively functions as a stop pin to force the impact wheel tomove axially to compress an energy storing spring toward a second axialposition under the cooperation of slots and engaging members (forexample steel balls). Once the impact wheel is moved to arrive at thesecond axial position where the impact wheel does not contact thestriking rod, an elastic potential energy of the energy storing springis released so that the impact wheel is forced to rotate at a speedhigher than a normal rotating speed under the cooperation of the slotsand the engaging member. With the aid of the rotating potential energy,the impact wheel impacts the striking rod strongly and effectivelyagain.

So in the case of absence of the stop pins, the striking devicefunctions as a stop pin as long as the resistance exceeds a certainscope. While a rotating shaft of the nailer device is rotated uniformly,the impact device is rotated at a speed varying periodically, which isalternately suspended and rotated at a high speed. Then the strikingdevice is impacted periodically by the impact device. Thus, it will beunderstood that the stop pins of the nailer device in the firstexemplary embodiment can be removed.

Springs 130, 420 in the second exemplary embodiment and the springs 13,42 in the first exemplary embodiment may be substituted with otherbiasing members or other means for producing attraction force orexclusion force, for example, magnetic members.

The impact wheel 100 in the second exemplary embodiment and the impactwheel 10 in the first exemplary embodiment may be substituted with apiston, a centrifugal member, or a spring to impact the striking rod.

In the first and second exemplary embodiments, the impact device isdriven to impact the striking device periodically, and the strikingdevice is moved in a reciprocating linear manner. However, those ofordinary skill in the art may easily understand that the striking devicemay be substituted with a lever mechanism, an end of which is impactedby the impact device to pivot about a pivotal axis, and the other end ofwhich can strike the nail. In this occasion, the striking device isreciprocating oscillated under the periodic impacts of the impactdevice.

From these described various alternatives, it will be understood thatthe present invention is not restricted as to the particular embodimentsillustrated and disclosed hereinabove. Accordingly, any substitutes andmodifications according to the spirit of the present invention will beregarded as falling within the range of the present invention.

What is claimed is:
 1. A nailer device, comprising: a housing containinga motor; a striking device having a striking portion for striking a nailand an impacted portion for receiving periodic impact motions; and atransmission mechanism mounted in the housing which translates rotatingmotions of the motor into the periodic impact motions upon the impactedportion of the striking device; wherein the transmission mechanismcomprises an impact assembly which imparts the periodic impact motionsupon the striking device, wherein the impact assembly comprises arotating shaft driven by the motor and a rotary member mounted on therotating shaft rotatable about a rotary axis and having at least oneimpact part which periodically contacts the impacted portion of thestriking device, wherein two recesses extending in two reverseddirections are respectively formed on the rotating shaft and the rotarymember, wherein an engaging member is arranged in the two recesses, andwherein an energy storing device is mounted between the rotating shaftand the rotary member.
 2. The nailer device of claim 1, comprising a DCbattery pack detachably mounted to a lower end of the housing forproviding power to the motor and a power switch mounted on a gripportion of the housing for controlling power provided to the motor fromthe DC battery pack.
 3. The nailer device of claim 1, wherein thehousing comprises a nozzle and at least a part of the striking device isdisposed within the nozzle.
 4. The nailer device of claim 3, wherein thenozzle has a nail containing opening for containing at least the head ofthe nail to be struck.
 5. The nailer device of claim 4, wherein the nailcontaining opening has an associated magnetic member for holding thehead of the nail to be struck.
 6. The nailer device of claim 1, whereinthe transmission mechanism comprises gear transmission parts wherebyrotating motions of the motor are translated into rotation motions ofthe impact assembly through a right angle.
 7. The nailer device of claim1, wherein, when the impact part of the rotary impact member contactsthe impacted portion of the striking device an impact force is providedby the impact part onto the impacted portion of the striking device in adirection perpendicular to the rotary axis.
 8. The nailer device ofclaim 1, wherein, when the impact part of the rotary member impacts theimpacted portion of the striking device, the striking device moves in adirection perpendicular to the rotary axis.
 9. The nailer device ofclaim 1, wherein, when the impact part of the rotary member impacts theimpacted portion of the striking device, normal lines of contactingsurfaces of the impacted portion of the striking device and the impactpart are perpendicular to the rotary axis.
 10. The nailer device ofclaim 1, wherein the rotary member is moveable between a first axialposition and a second axial position relative to the rotating shaftwhereby, when the rotary member is at the first axial position, theimpacted portion of the striking device is contactable with the impactpart at a predetermined position on a rotating circle followed by theimpact part of the rotary member and the energy storing device is in anenergy-releasing state and, when the rotary impact member is at thesecond axial position, the impact part contacts the impacted portion ofthe striking device and is at least temporarily stopped from followingthe rotating circle and the energy storing device is in anenergy-storing state.
 11. The nailer device of claim 1, comprising atleast one stopper fixed in the housing and located on a rotating circlefollowed by the impact part of the rotary member and the rotary memberis moveable between a first axial position and a second axial positionrelative to the rotating shaft whereby, when the rotary member is at thefirst axial position, the impacted portion of the striking device iscontactable with the impact part at a predetermined position on therotating circle followed by the impact part of the rotary member and theenergy scoring device is in an energy-releasing state and, when therotary impact member is at the second axial position, the impact part isat least temporarily stopped from following the rotating circle and theenergy storing device is in an energy-storing state.
 12. A nailerdevice, comprising: a housing containing a motor; a striking devicehaving a striking portion for striking a nail and an impacted portionfor receiving periodic impact motions; and a transmission mechanismmounted in the housing which translates rotating motions of the motorinto the periodic impact motions upon the impacted portion of thestriking device; wherein the transmission mechanism comprises an impactassembly which imparts the periodic impact motions upon the strikingdevice, wherein the impact assembly comprises a rotary member rotatableabout a rotary shaft driven by the motor and having at least one impactpart which periodically contacts the impacted portion of the strikingdevice, a pair of inclined recesses, each of which is V-shaped, formedon the rotary shaft, and a pair of arcuate guiding recesses, each ofwhich faces one recess of the pair of inclined recesses formed on aninternal cylindrical surface of the rotary member, and wherein an opendirection of the arcuate guiding recesses is reversed to that of theinclined recesses.
 13. The nailer device of claim 12, wherein, when theimpact part of the rotary member contacts the impacted portion of thestriking device an impact force is provided by the impact part onto theimpacted portion of the striking device in a direction perpendicular tothe rotary axis.
 14. The nailer device of claim 12, wherein, when theimpact part of the rotary member impacts the impacted portion of thestriking device, the striking device moves in a direction perpendicularto the rotary axis.
 15. The nailer device of claim 12, wherein, when theimpact part of the rotary member impacts the impacted portion of thestriking device, normal lines of contacting surfaces of the impactedportion of the striking device and the impact part are perpendicular tothe rotary axis.
 16. The nailer device of claim 12, comprising a DCbattery pack detachably mounted to a lower end of the housing forproviding power to the motor and a power switch mounted on a gripportion of the housing for controlling power provided to the motor fromthe DC battery pack.
 17. The nailer device of claim 12, wherein thehousing comprises a nozzle and at least a part of the striking device isdisposed within the nozzle.
 18. The nailer device of claim 17, whereinthe nozzle has a nail containing opening for containing at least thehead of the nail to be struck.
 19. The nailer device of claim 18,wherein the nail containing opening has an associated magnetic memberfor holding the head of the nail to be struck.
 20. The nailer device ofclaim 12, wherein the transmission mechanism comprises gear transmissionparts whereby rotating motions of the motor are translated into rotationmotions of the impact assembly through a right angle.
 21. A nailerdevice, comprising: a housing containing a motor; a striking devicehaving a striking portion for striking a nail and an impacted portionfor receiving periodic impact motions; and a transmission mechanismmounted in the housing which translates rotating motions of the motorinto the periodic impact motions upon the impacted portion of thestriking device; wherein the transmission mechanism comprises an impactassembly which imparts the periodic impact motions upon the strikingdevice, wherein the impact assembly comprises a rotary member rotatableabout a rotary shaft driven by the motor and having at least one impactpart which periodically contacts the impacted portion of the strikingdevice, a pair of inclined recesses, each of which is V-shaped, formedon the rotary shaft, and a pair of guiding recesses, each of which facesone recess of the pair of inclined recesses formed on the rotary member,and wherein an open direction of the guiding recesses is reversed tothat of at least a portion of the inclined recesses.
 22. The nailerdevice of claim 21, wherein, when the impact part of the rotary membercontacts the impacted portion of the striking device an impact force isprovided by the impact part onto the impacted portion of the strikingdevice in a direction perpendicular to the rotary axis.
 23. The nailerdevice of claim 21, wherein, when the impact part of the rotary memberimpacts the impacted portion of the striking device, the striking devicemoves in a direction perpendicular to the rotary axis.
 24. The nailerdevice of claim 21, wherein, when the impact part of the rotary memberimpacts the impacted portion of the striking device, normal lines ofcontacting surfaces of the impacted portion of the striking device andthe impact part are perpendicular to the rotary axis.
 25. The nailerdevice of claim 21, comprising a DC battery pack detachably mounted to alower end of the housing for providing power to the motor and a powerswitch mounted on a grip portion of the housing for controlling powerprovided to the motor from the DC battery pack.
 26. The nailer device ofclaim 21, wherein the housing comprises a nozzle and at least a part ofthe striking device is disposed within the nozzle.
 27. The nailer deviceof claim 26, wherein the nozzle has a nail containing opening forcontaining at least the head of the nail to be struck.
 28. The nailerdevice of claim 27, wherein the nail containing opening has anassociated magnetic member for holding the head of the nail to bestruck.
 29. The nailer device of claim 21, wherein the transmissionmechanism comprises gear transmission parts whereby rotating motions ofthe motor are translated into rotation motions of the impact assemblythrough a right angle.
 30. The nailer device of claim 21, wherein themotor has a motor shaft having a rotational axis disposed in a directionthat is transverse to a direction of movement of the striking device.31. The nailer device of claim 21, wherein the motor has a motor shafthaving a rotational axis disposed in a direction that is perpendicularto a direction of movement of the striking device.
 32. The nailer deviceof claim 21, wherein the motor has a motor shaft having a rotationalaxis disposed in a direction that is aligned with a direction ofmovement of the striking device.